This place name is given as 米{⿰米犀}橋 with the note 昔有富人積米{⿰米屖}建此故名. {⿰米犀} and {⿰米屖} should be the same character, and the way the note is written, it should be a common character that does not need an explanation. The two characters could be corruptions or variants of U+7CCF 糏 'rice grits left after hulling' which would fit the sense here. Regardless, additional evidence is needed to determine which of {⿰米犀} and {⿰米屖} is the correct glyph, so suggest to postpone for additional evidence.

This situation is similar to 遲 (U+9072) and 遟 (U+905F), and 屖 is always used as the variant of 犀, specially for the components. I think ⿰米犀 and ⿰米屖 are both used for that place, so it is better to keep them both.